Keyword: focusing
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MOOB03 Bendable KB Type Focusing Mirrors Designed for TPS IR Beamline simulation, FEM, synchrotron-radiation, synchrotron 17
 
  • T.C. Tseng, H.S. Fung, H.C. Ho, K.H. Hsu, C.S. Huang, D.-G. Huang, C.K. Kuan, W.Y. Lai, C.J. Lin, S.Y. Perng, H.S. Wang
    NSRRC, Hsinchu, Taiwan
 
  A new IR beamline has been scheduled at TPS beam-line construction Phase III. The new beamline optical design is following the structure of the existed TLS IR beamline. However, the focusing mirrors has to be re-deign according to different situation. These KB type mirrors (HFM and VFM) are same thickness flat stain-less plates assembled with bending arms and bended with single motor each to fit quintic polynomial surface pro-files for focusing and also modifying arc source effect of bending section. For a same thickness plate in addition with the bending arms effect to form a desired polynomi-al surface profile, it demands specific width distribution. With the drawing method and FEM iteration simulation, the optimized surface polynomial equation and width distribution design of the mirror plates were defined. The detailed design sequences will be described in this paper.  
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DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2020-MOOB03  
About • paper received ※ 29 July 2021       paper accepted ※ 01 September 2021       issue date ※ 30 October 2021  
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TUOA01 Surface Twist Characterization and Compensation of an Elliptically Bent Hard X-Ray Mirror optics, MMI, photon, simulation 99
 
  • Z. Qiao, J.W.J. Anton, L. Assoufid, S.P. Kearney, S.T. Mashrafi, J. Qian, X. Shi, D. Shu
    ANL, Lemont, Illinois, USA
 
  Funding: Work supported by the U.S. Department of Energy, Office of Science under Control DE-AC02-06CH11357
Deformable optics, including mechanically-bent and bimorph mirrors, are essential optical elements for X-ray beam dynamical focusing and wavefront correction. Existing mechanical bender technology often suffers from poor repeatability and does not include twist compensation. We recently developed an elliptically bent mirror based on a laminar flexure bending mechanism that yielded promising results*,**. In this work, the mirror surface twist was characterized using a Fizeau interferometer under different bending conditions. By applying a shimming correction, the surface twist was successfully reduced from 50 urad to 1.5 urad. The twist angle variation from no bending to the maximum bending is less than 0.5 urad. Our simulation results show that these numbers are significantly lower than the required values to ensure optimum optical performance. The study demonstrates the effectiveness of the twist compensation procedures and validates the mirror bender design parameters.
*Shu, D. et al., AIP Conference Proceedings. Vol. 2054. No. 1, 2019.
**Anton, Jayson WJ et al., Optomechanical Engineering 2019. Vol. 11100, 2019.
 
slides icon Slides TUOA01 [2.257 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2020-TUOA01  
About • paper received ※ 29 July 2021       paper accepted ※ 14 October 2021       issue date ※ 28 October 2021  
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TUOB01 Exactly-constrained KB Mirrors for Sirius/LNLS Beamlines: Design and Commissioning of the TARUMÃ Station Nanofocusing Optics at CARNAÚBA Beamline alignment, optics, experiment, MMI 111
 
  • G.B.Z.L. Moreno, C.S.N.C. Bueno, R.R. Geraldes, F.R. Lena, S.A.L. Luiz, E.O. Pereira, H.C.N. Tolentino, Y.R. Tonin, W.H. Wilendorf
    LNLS, Campinas, Brazil
 
  Funding: Ministry of Science, Technology and Innovation (MCTI)
Next-generation nanoprobes, empowered by diffraction-limited storage rings, as Sirius/LNLS, present high-performance requirements aiming at high spatial resolution and throughput. For the focusing optics, this means assuring a small and non-astigmatic probe, high flux density, and remarkably high position stability, while also preserving beam wavefront. At stations further dedicated to spectromicroscopy and in-situ experiments, these requirements add up to having achromatic design and suitable working distance, respectively. In this way, Kirkpatrick-Baez (KB) mirrors have been chosen as the most appropriate solution for Sirius focusing optics. At TARUMÃ*, the first delivered nanoprobe at Sirius, the KB focuses the beam down to a 120 nm spot size (>8 keV) with a 440 mm working distance. This brought the requirements on the mirror’s angular stability to less than 10 nrad RMS, surface quality to single-digit nanometers, and alignment tolerances to the range of hundreds of nrad, which can be even tighter for other nanoprobes. Such specifications are particularly challenging regarding clamping, vibration, and thermal expansion budgets, even testing optical metrology limits during alignment and validation phases. The resulting KB mechanism is an opto-mechanical system with an exactly-constrained, deterministic design**, and suspension modes well above 250 Hz, sufficiently coupling optics to sample in the same 6-DoF base. It provides low-order aberration corrections by single degree-of-freedom alignment with piezo actuators, while higher order aberrations from clamping and thermal deformations are mitigated by gluing each mirror to flexure-based mounting frames. This contribution presents the design, assembly, and commissioning of the KB system at TARUMÃ as a reference case.
*Tolentino, H.C.N., et al. "TARUMÃ station for the CARNAÚBA beamline at SIRIUS/LNLS" SPIE 11112 19
**Geraldes, R.R., et al. "The Design of Exactly-constrained X-ray Mirror Systems for Sirius." MEDSI18
 
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slides icon Slides TUOB01 [5.780 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2020-TUOB01  
About • paper received ※ 25 July 2021       paper accepted ※ 17 September 2021       issue date ※ 06 November 2021  
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TUPC10 Modular Nanopositioning Flexure Stages Development for APS Upgrade K-B Mirror Nanofocusing Optics optics, alignment, photon, synchrotron 199
 
  • D. Shu, J.W.J. Anton, L. Assoufid, S.J. Bean, D. Capatina, V. De Andrade, E.M. Dufresne, T. Graber, R. Harder, D. Haskel, K. Jasionowski, S.P. Kearney, A.A. Khan, B. Lai, W. Liu, J. Maser, S.T. Mashrafi, G.K. Mistri, S. Narayanan, C.A. Preissner, M. Ramanathan, L. Rebuffi, R. Reininger, O.A. Schmidt, X. Shi, J.Z. Tischler, K.J. Wakefield, D. Walko, J. Wang, X. Zhang
    ANL, Lemont, Illinois, USA
 
  Funding: Work supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-AC02-06CH11357.
Kirkpatrick and Baez (K-B) mirror-based nanofocusing optics* will be applied to many beamlines endstation instruments for the APS-Upgrade (APS-U) project. Precision nanopositioning stages with nanometer-scale linear positioning resolution and nanoradian-scale angular stability are needed as alignment apparatus for the K-B mirror hard X-ray nanofocusing optics. For instance, at the APS-U 19-ID In Situ Nanoprobe beamline endstation**, to maintain stability of a 20-nm focal spot on the sample, nanofocusing K-B mirror system with 5-nrad angular stability is required. Similar angular resolution and stability are also required for APS-U 9-ID CSSI***, APS-U 34-ID ATOMIC**** and other beamline endstation instruments. Modular nanopositioning flexure stages have been developed for the K-B mirror nanofocusing optics, which includes: linear vertical and horizontal flexure stages, tip-tilting flexure stages, and flexure mirror benders for bendable nanofocusing K-B mirrors, to overcome the performance limitations of precision ball-bearing-based or roller-bearing-based stage systems. The mechanical design and preliminary test results are described in this paper.
* Kirkpartrick and Baez, JOSA. 1948; 38(9): 766-773.
** S. Kearney et al., this conference.
*** J. Anton et al., this conference.
**** C. Preissner et al., this conference.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2020-TUPC10  
About • paper received ※ 02 August 2021       paper accepted ※ 21 October 2021       issue date ※ 31 October 2021  
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TUPC15 A New Ultra-Stable Variable Projection Microscope for the APS Upgrade of 32-ID optics, synchrotron, photon, interface 211
 
  • S.J. Bean, V. De Andrade, A. Deriy, K. Fezzaa, T. Graber, J. Matus, C.A. Preissner, D. Shu
    ANL, Lemont, Illinois, USA
 
  Funding: Advanced Photon Source, a U.S. Department of Energy (DOE) Office of Science User Facility, operated for the DOE Office of Science by Argonne National Laboratory under Contract No.DE-AC02-06CH11357
A new nano-computed tomography projection microscope (n-CT) is being designed as part the Advanced Photon Source Upgrade (APS-U) beamline enhancement at sector 32-ID. The n-CT will take advantage of the APS-U source and provide new capabilities to the imaging program at 32-ID. A Kirkpatrick and Baez (KB) mirror-based nanofocusing optics [1,2] will be implemented in this design. To meet the n-CT imaging goals, it is the desire to have sub 10 nanometer vibrational and thermal drift stability over 10-minute measurement durations between the optic and the sample. In addition to the stability requirements, it is desired to have a variable length sample projection axis of up to 450 mm. Such stability and motion requirements are challenging to accomplish simultaneously due to performance limitations of traditional motion mechanics and present a significant engineering challenge. To overcome these limitations, the proposed n-CT design incorporates granite air bearing concepts initially used in the Velociprobe [3]. These types of granite stages have been incorporated into many designs at APS [4] and at other synchrotron facilities [5]. Utilizing the granite air bearing concept, in tandem with other design aspects in the instrument, the requirements become reachable. A novel multi-degree of freedom wedge configuration is also incorporated to overcome space limitations. The design of this instrument is described in this paper.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2020-TUPC15  
About • paper received ※ 12 August 2021       paper accepted ※ 19 October 2021       issue date ※ 02 November 2021  
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